$ git clone -n https://src.fedoraproject.org/rpms/rust-routinator.git /var/lib/mock/f41-build-811110-147141/root/chroot_tmpdir/scmroot/rust-routinator
Cloning into '/var/lib/mock/f41-build-811110-147141/root/chroot_tmpdir/scmroot/rust-routinator'...
$ git fetch origin 8ef76a11ed1d25b026fb5645b84b23c8855f5fa7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-routinator
 * [new ref]         8ef76a11ed1d25b026fb5645b84b23c8855f5fa7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ef76a1 Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces