$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-corelg.git /var/lib/mock/f41-build-801648-13688/root/chroot_tmpdir/scmroot/gap-pkg-corelg
Cloning into '/var/lib/mock/f41-build-801648-13688/root/chroot_tmpdir/scmroot/gap-pkg-corelg'...
$ git fetch origin 53358d45c1e51652531c1197ea2a1ddf85f067b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-corelg
 * [new ref]         53358d45c1e51652531c1197ea2a1ddf85f067b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53358d4 Rebuild for gap 4.13.0