$ git clone -n https://src.fedoraproject.org/rpms/root-tail.git /var/lib/mock/f41-build-746234-13353/root/chroot_tmpdir/scmroot/root-tail
Cloning into '/var/lib/mock/f41-build-746234-13353/root/chroot_tmpdir/scmroot/root-tail'...
$ git fetch origin 598fb613a0d3ab1d26f603dc415b4615f7c85a4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/root-tail
 * [new ref]         598fb613a0d3ab1d26f603dc415b4615f7c85a4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 598fb61 Eliminate use of obsolete %patchN syntax (#2283636)