$ git clone -n https://src.fedoraproject.org/rpms/frr.git /var/lib/mock/f41-build-842359-161603/root/chroot_tmpdir/scmroot/frr
Cloning into '/var/lib/mock/f41-build-842359-161603/root/chroot_tmpdir/scmroot/frr'...
$ git fetch origin c39d922dae76f61e77609ba49f6cd268f486d0a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/frr
 * [new ref]         c39d922dae76f61e77609ba49f6cd268f486d0a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c39d922 New version 10.1