$ git clone -n https://src.fedoraproject.org/rpms/rust-scx_layered.git /var/lib/mock/f41-build-811107-147141/root/chroot_tmpdir/scmroot/rust-scx_layered
Cloning into '/var/lib/mock/f41-build-811107-147141/root/chroot_tmpdir/scmroot/rust-scx_layered'...
$ git fetch origin c1d8529d68793fffe0b68319b745da06641233e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-scx_layered
 * [new ref]         c1d8529d68793fffe0b68319b745da06641233e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1d8529 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces