$ git clone -n https://src.fedoraproject.org/rpms/rust-routinator-ui.git /var/lib/mock/f41-build-811108-147141/root/chroot_tmpdir/scmroot/rust-routinator-ui
Cloning into '/var/lib/mock/f41-build-811108-147141/root/chroot_tmpdir/scmroot/rust-routinator-ui'...
$ git fetch origin a096d6d0726cd851e1cf8cfcd47d9f3d78890926:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-routinator-ui
 * [new ref]         a096d6d0726cd851e1cf8cfcd47d9f3d78890926 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a096d6d Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces