$ git clone -n https://src.fedoraproject.org/rpms/rust-nuon.git /var/lib/mock/f42-build-3264063-41244/root/chroot_tmpdir/scmroot/rust-nuon
Cloning into '/var/lib/mock/f42-build-3264063-41244/root/chroot_tmpdir/scmroot/rust-nuon'...
$ git fetch origin b4c949dc50c6a90a209e03077183302916a4dcd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nuon
 * [new ref]         b4c949dc50c6a90a209e03077183302916a4dcd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4c949d Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild