$ git clone -n https://src.fedoraproject.org/rpms/singularity-ce.git /var/lib/mock/f42-build-866816-174160/root/chroot_tmpdir/scmroot/singularity-ce
Cloning into '/var/lib/mock/f42-build-866816-174160/root/chroot_tmpdir/scmroot/singularity-ce'...
$ git fetch origin 5eaebeac6276fdcc8ddd7b7dbd03d94b6b48a888:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/singularity-ce
 * [new ref]         5eaebeac6276fdcc8ddd7b7dbd03d94b6b48a888 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5eaebea Upgrade to 4.2.2 upstream version.