the url of https://github.com/CFMIP/COSPv2.0/ in the external.cfg was brock.

### Brief summary of bug
the URL of https://github.com/CFMIP/COSPv2.0/ in the external.cfg was brock.
will cause the corruption of the svn and git process of checkout_externals.

### General bug information
(base) root@mikelinux:/home/mike/my_cesm_sandbox# ./manage_externals/checkout_externals
Processing externals description file : Externals.cfg
Checking status of externals: cice, cime, cism, clm, mosart, pop, rtm, ww3,
Checking out externals: cice, ERROR:root:Command '['git', 'clone', '--quiet', 'https://github.com/ESCOMP/CESM_CICE5', 'cice']' returned non-zero exit status 128.
ERROR:root:Failed with output:
error: 320 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: fetch-pack: invalid index-pack output

ERROR: In directory
/home/mike/my_cesm_sandbox/components
Process did not run successfully; returned status 128:
git clone --quiet https://github.com/ESCOMP/CESM_CICE5 cice
See above for output from failed command.

ERROR:root:Failed with output:
error: 320 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: fetch-pack: invalid index-pack output

ERROR: In directory
/home/mike/my_cesm_sandbox/components
Process did not run successfully; returned status 128:
git clone --quiet https://github.com/ESCOMP/CESM_CICE5 cice
See above for output from failed command.

ERROR: Failed with output:
error: 320 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: fetch-pack: invalid index-pack output

ERROR: In directory
/home/mike/my_cesm_sandbox/components
Process did not run successfully; returned status 128:
git clone --quiet https://github.com/ESCOMP/CESM_CICE5 cice
See above for output from failed command.

**CESM version you are using:** [Output of `git describe`]
CESM2
**Machine you are using:** [Fill this in]
ubuntu 22.04 desktop
**Have you modified the code? (If so, please point us to you changes.):** [Yes / No]
No
### Details of bug

[Fill in details here.]

### Steps to reproduce the problem. Include externals description file(s) and link to public repository

[Fill this in with anything relevant that you haven't already noted; if there is nothing to add, delete this section.]

### Screen output or log file showing the error message and context

[Fill this in with anything relevant that you haven't already noted; if there is nothing to add, delete this section.]