$ git clone -n https://src.fedoraproject.org/rpms/inn.git /var/lib/mock/f41-build-813582-148686/root/chroot_tmpdir/scmroot/inn
Cloning into '/var/lib/mock/f41-build-813582-148686/root/chroot_tmpdir/scmroot/inn'...
$ git fetch origin 5a3e20a768a24d413876679d182e0e7074746bc8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/inn
 * [new ref]         5a3e20a768a24d413876679d182e0e7074746bc8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a3e20a Perl 5.40 rebuild