$ git clone -n https://src.fedoraproject.org/rpms/singularity-ce.git /var/lib/mock/f39-build-1564893-37531/root/chroot_tmpdir/scmroot/singularity-ce
Cloning into '/var/lib/mock/f39-build-1564893-37531/root/chroot_tmpdir/scmroot/singularity-ce'...
$ git fetch origin 9a1283fd4248fa6bee0a2df1ba8b8b91c98209e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/singularity-ce
 * [new ref]         9a1283fd4248fa6bee0a2df1ba8b8b91c98209e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a1283f Upgrade to 3.11.5 upstream version.