$ git clone -n https://src.fedoraproject.org/rpms/python-persistent.git /var/lib/mock/f39-build-1430567-31729/root/chroot_tmpdir/scmroot/python-persistent
Cloning into '/var/lib/mock/f39-build-1430567-31729/root/chroot_tmpdir/scmroot/python-persistent'...
$ git fetch origin e99a3259dfcc0118e862c3ca4b77083ba452ae86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-persistent
 * [new ref]         e99a3259dfcc0118e862c3ca4b77083ba452ae86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e99a325 Version 5.1