$ git clone -n https://src.fedoraproject.org/rpms/gcl.git /var/lib/mock/f39-build-1845807-42099/root/chroot_tmpdir/scmroot/gcl
Cloning into '/var/lib/mock/f39-build-1845807-42099/root/chroot_tmpdir/scmroot/gcl'...
$ git fetch origin 8c4f4f87365c82d94c9bba2f2199fae0a10e8f6e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gcl
 * [new ref]         8c4f4f87365c82d94c9bba2f2199fae0a10e8f6e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c4f4f8 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild