$ git clone -n https://src.fedoraproject.org/rpms/rust-mbrman.git /var/lib/mock/f40-build-2681848-67962/root/chroot_tmpdir/scmroot/rust-mbrman
Cloning into '/var/lib/mock/f40-build-2681848-67962/root/chroot_tmpdir/scmroot/rust-mbrman'...
$ git fetch origin 03cbb7a24144d5e575cee41e9a93848f7340f9c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-mbrman
 * [new ref]         03cbb7a24144d5e575cee41e9a93848f7340f9c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03cbb7a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild