$ git clone -n https://src.fedoraproject.org/rpms/rust-rd-util.git /var/lib/mock/f42-build-3264084-41244/root/chroot_tmpdir/scmroot/rust-rd-util
Cloning into '/var/lib/mock/f42-build-3264084-41244/root/chroot_tmpdir/scmroot/rust-rd-util'...
$ git fetch origin c451fd519867e5c6f3d60980e11306f28f791345:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rd-util
 * [new ref]         c451fd519867e5c6f3d60980e11306f28f791345 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c451fd5 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild