$ git clone -n https://src.fedoraproject.org/rpms/golang-github-apapsch-jsonmerge-2.git /var/lib/mock/f38-build-side-42-init-devel-1414399-31434/root/chroot_tmpdir/scmroot/golang-github-apapsch-jsonmerge-2
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1414399-31434/root/chroot_tmpdir/scmroot/golang-github-apapsch-jsonmerge-2'...
$ git fetch origin ea65a6ae9dee853a2ecf871565cd1730e0a7957d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-apapsch-jsonmerge-2
 * [new ref]         ea65a6ae9dee853a2ecf871565cd1730e0a7957d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea65a6a Initial import