$ git clone -n https://src.fedoraproject.org/rpms/rust-safe_arch.git /var/lib/mock/f40-build-2657941-66917/root/chroot_tmpdir/scmroot/rust-safe_arch
Cloning into '/var/lib/mock/f40-build-2657941-66917/root/chroot_tmpdir/scmroot/rust-safe_arch'...
$ git fetch origin 126543c5d8fa8580a3819015db8ba2031c2d830b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-safe_arch
 * [new ref]         126543c5d8fa8580a3819015db8ba2031c2d830b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 126543c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild