$ git clone -n https://src.fedoraproject.org/rpms/cglib.git /var/lib/mock/f41-build-2441721-25470/root/chroot_tmpdir/scmroot/cglib
Cloning into '/var/lib/mock/f41-build-2441721-25470/root/chroot_tmpdir/scmroot/cglib'...
$ git fetch origin 5fb90c3cc5575b5599fabd87f68c18b3986e017c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cglib
 * [new ref]         5fb90c3cc5575b5599fabd87f68c18b3986e017c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5fb90c3 Convert to %autorelease and %autochangelog