$ git clone -n https://src.fedoraproject.org/rpms/python-mirrors-countme.git /var/lib/mock/f39-build-1635145-39846/root/chroot_tmpdir/scmroot/python-mirrors-countme
Cloning into '/var/lib/mock/f39-build-1635145-39846/root/chroot_tmpdir/scmroot/python-mirrors-countme'...
$ git fetch origin 9d1c9adfc0da011c97e147273e81b27223070134:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mirrors-countme
 * [new ref]         9d1c9adfc0da011c97e147273e81b27223070134 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d1c9ad Version 0.1.2