$ git clone -n https://src.fedoraproject.org/rpms/gnome-flashback.git /var/lib/mock/f40-build-2609923-63831/root/chroot_tmpdir/scmroot/gnome-flashback
Cloning into '/var/lib/mock/f40-build-2609923-63831/root/chroot_tmpdir/scmroot/gnome-flashback'...
$ git fetch origin 20a8bc979f58ffb1c38aa17142700aacf4e69cc3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-flashback
 * [new ref]         20a8bc979f58ffb1c38aa17142700aacf4e69cc3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20a8bc9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild