$ git clone -n https://src.fedoraproject.org/rpms/poxml.git /var/lib/mock/f45-build-28877-633/root/chroot_tmpdir/scmroot/poxml
Cloning into '/var/lib/mock/f45-build-28877-633/root/chroot_tmpdir/scmroot/poxml'...
$ git fetch origin 814dba47fdec0d3f83146d48a105308533f9b7d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/poxml
 * [new ref]         814dba47fdec0d3f83146d48a105308533f9b7d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 814dba4 26.08.1