$ git clone -n https://src.fedoraproject.org/rpms/c4log.git /var/lib/mock/f39-build-1466174-33650/root/chroot_tmpdir/scmroot/c4log
Cloning into '/var/lib/mock/f39-build-1466174-33650/root/chroot_tmpdir/scmroot/c4log'...
$ git fetch origin 016fa89b3ad0ae71e16eda70b46fcb45d9501ae3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/c4log
 * [new ref]         016fa89b3ad0ae71e16eda70b46fcb45d9501ae3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 016fa89 Fix wrong multilib library paths in .cmake files (fix RHBZ#2223194)