$ git clone -n https://src.fedoraproject.org/rpms/oz.git /var/lib/mock/f43-build-61047709-6588158/root/chroot_tmpdir/scmroot/oz
Cloning into '/var/lib/mock/f43-build-61047709-6588158/root/chroot_tmpdir/scmroot/oz'...
$ git fetch origin 75105e5ebf429f07ec55f1983ee1cba1df3ea82a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oz
 * [new ref]         75105e5ebf429f07ec55f1983ee1cba1df3ea82a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75105e5 Backport PR #318 to avoid monotonic dependency