$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-groupoids.git /var/lib/mock/f41-build-side-1-2951836-35498/root/chroot_tmpdir/scmroot/gap-pkg-groupoids
Cloning into '/var/lib/mock/f41-build-side-1-2951836-35498/root/chroot_tmpdir/scmroot/gap-pkg-groupoids'...
$ git fetch origin c62313bde5de78ea44914957eb6ee93c04b053b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-groupoids
 * [new ref]         c62313bde5de78ea44914957eb6ee93c04b053b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c62313b Version 1.76