$ git clone -n https://src.fedoraproject.org/rpms/rust-rustc_version0.3.git /var/lib/mock/f40-build-2657918-66917/root/chroot_tmpdir/scmroot/rust-rustc_version0.3
Cloning into '/var/lib/mock/f40-build-2657918-66917/root/chroot_tmpdir/scmroot/rust-rustc_version0.3'...
$ git fetch origin 1ff5e79130a5c02603048af4f9e0b451db9bf3d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustc_version0.3
 * [new ref]         1ff5e79130a5c02603048af4f9e0b451db9bf3d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ff5e79 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild