$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-io.git /var/lib/mock/f38-build-711531-93930/root/chroot_tmpdir/scmroot/gap-pkg-io
Cloning into '/var/lib/mock/f38-build-711531-93930/root/chroot_tmpdir/scmroot/gap-pkg-io'...
$ git fetch origin 8d0930f7833c86b404f33576d397cd40f1369321:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-io
 * [new ref]         8d0930f7833c86b404f33576d397cd40f1369321 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d0930f Version 4.8.1.