$ git clone -n https://src.fedoraproject.org/rpms/bsdiff.git /var/lib/mock/f40-build-2274803-55030/root/chroot_tmpdir/scmroot/bsdiff
Cloning into '/var/lib/mock/f40-build-2274803-55030/root/chroot_tmpdir/scmroot/bsdiff'...
$ git fetch origin 65a7c5942cc0c7c9a087eb1983fab73ce66833e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bsdiff
 * [new ref]         65a7c5942cc0c7c9a087eb1983fab73ce66833e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65a7c59 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild