$ git clone -n https://src.fedoraproject.org/rpms/dmg2img.git /var/lib/mock/f40-build-2344268-59904/root/chroot_tmpdir/scmroot/dmg2img
Cloning into '/var/lib/mock/f40-build-2344268-59904/root/chroot_tmpdir/scmroot/dmg2img'...
$ git fetch origin 769721d9b4356c5731593ff610ca9dbc57fe1e6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dmg2img
 * [new ref]         769721d9b4356c5731593ff610ca9dbc57fe1e6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 769721d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild