$ git clone -n https://src.fedoraproject.org/rpms/rust-gvdb-macros.git /var/lib/mock/f40-build-2555909-62036/root/chroot_tmpdir/scmroot/rust-gvdb-macros
Cloning into '/var/lib/mock/f40-build-2555909-62036/root/chroot_tmpdir/scmroot/rust-gvdb-macros'...
$ git fetch origin 6af342a9babb5ccd8cd74670a0e0e4b6d1ea7127:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gvdb-macros
 * [new ref]         6af342a9babb5ccd8cd74670a0e0e4b6d1ea7127 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6af342a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild