$ git clone -n https://src.fedoraproject.org/rpms/python-jsonschema-epel.git /var/lib/mock/f39-build-1512717-35572/root/chroot_tmpdir/scmroot/python-jsonschema-epel
Cloning into '/var/lib/mock/f39-build-1512717-35572/root/chroot_tmpdir/scmroot/python-jsonschema-epel'...
$ git fetch origin 4ca177700314b37677c8ad755bb43905931631de:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jsonschema-epel
 * [new ref]         4ca177700314b37677c8ad755bb43905931631de -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ca1777 EPEL-only package