$ git clone -n https://src.fedoraproject.org/rpms/crash.git /var/lib/mock/f39-build-2355286-60293/root/chroot_tmpdir/scmroot/crash
Cloning into '/var/lib/mock/f39-build-2355286-60293/root/chroot_tmpdir/scmroot/crash'...
$ git fetch origin 821d228948c75d5630bb8e8ba48484f256e207ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/crash
 * [new ref]         821d228948c75d5630bb8e8ba48484f256e207ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
Updating files:  75% (43/57)
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Updating files: 100% (57/57)
Updating files: 100% (57/57), done.
HEAD is now at 821d228 Update to the latest commit <5977936c0a91>