$ git clone -n https://src.fedoraproject.org/rpms/ongres-stringprep.git /var/lib/mock/f40-build-2265571-54611/root/chroot_tmpdir/scmroot/ongres-stringprep
Cloning into '/var/lib/mock/f40-build-2265571-54611/root/chroot_tmpdir/scmroot/ongres-stringprep'...
$ git fetch origin 1438923ae1db35432dcdcdcc74241ada383541f9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ongres-stringprep
 * [new ref]         1438923ae1db35432dcdcdcc74241ada383541f9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1438923 Update dependencies for velocity-2