$ git clone -n https://src.fedoraproject.org/rpms/gnome-flashback.git /var/lib/mock/f39-build-1695984-41169/root/chroot_tmpdir/scmroot/gnome-flashback
Cloning into '/var/lib/mock/f39-build-1695984-41169/root/chroot_tmpdir/scmroot/gnome-flashback'...
$ git fetch origin a24a6d26b6c08b431bf4573903c711972de6cbf5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-flashback
 * [new ref]         a24a6d26b6c08b431bf4573903c711972de6cbf5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a24a6d2 license: Convert to SPDX