$ git clone -n https://src.fedoraproject.org/rpms/rust-wayland-server.git /var/lib/mock/f39-build-2261559-54414/root/chroot_tmpdir/scmroot/rust-wayland-server
Cloning into '/var/lib/mock/f39-build-2261559-54414/root/chroot_tmpdir/scmroot/rust-wayland-server'...
$ git fetch origin c74504c0d6f8ca61bb23c3b19bb44a056f9302ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-wayland-server
 * [new ref]         c74504c0d6f8ca61bb23c3b19bb44a056f9302ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c74504c Update to 0.31.0 (rhbz#2156607)