$ git clone -n https://src.fedoraproject.org/rpms/rust-erdtree.git /var/lib/mock/f40-build-1794022-24862/root/chroot_tmpdir/scmroot/rust-erdtree
Cloning into '/var/lib/mock/f40-build-1794022-24862/root/chroot_tmpdir/scmroot/rust-erdtree'...
$ git fetch origin 32c425df06116dc0ed1094430f7a3172a871defc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-erdtree
 * [new ref]         32c425df06116dc0ed1094430f7a3172a871defc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 32c425d Rebuild with Rust 1.78 to fix incomplete debuginfo and backtraces