$ git clone -n https://src.fedoraproject.org/rpms/python-mirrors-countme.git /var/lib/mock/f45-build-31542-652/root/chroot_tmpdir/scmroot/python-mirrors-countme
Cloning into '/var/lib/mock/f45-build-31542-652/root/chroot_tmpdir/scmroot/python-mirrors-countme'...
$ git fetch origin f866c06b22a793adc6c43c550c50366b3274370b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mirrors-countme
 * [new ref]         f866c06b22a793adc6c43c550c50366b3274370b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f866c06 Version 0.1.5