$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-transgrp.git /var/lib/mock/f45-build-10072-413/root/chroot_tmpdir/scmroot/gap-pkg-transgrp
Cloning into '/var/lib/mock/f45-build-10072-413/root/chroot_tmpdir/scmroot/gap-pkg-transgrp'...
$ git fetch origin ff8136a3c02a0c9dd363f459da53ecc8230f2602:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-transgrp
 * [new ref]         ff8136a3c02a0c9dd363f459da53ecc8230f2602 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff8136a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild