$ git clone -n https://src.fedoraproject.org/rpms/Macaulay2.git /var/lib/mock/f41-build-859622-168699/root/chroot_tmpdir/scmroot/Macaulay2
Cloning into '/var/lib/mock/f41-build-859622-168699/root/chroot_tmpdir/scmroot/Macaulay2'...
$ git fetch origin ceb56615468fe18ba6392062aaabaf08b4872fd9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/Macaulay2
 * [new ref]         ceb56615468fe18ba6392062aaabaf08b4872fd9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ceb5661 Rebuild for nauty 2.8.9