$ git clone -n https://src.fedoraproject.org/rpms/rust-gdk4-x11.git /var/lib/mock/f40-build-2156676-50918/root/chroot_tmpdir/scmroot/rust-gdk4-x11
Cloning into '/var/lib/mock/f40-build-2156676-50918/root/chroot_tmpdir/scmroot/rust-gdk4-x11'...
$ git fetch origin 3a730230f7e1db6543c5637abda2b210bdb81c57:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gdk4-x11
 * [new ref]         3a730230f7e1db6543c5637abda2b210bdb81c57 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a73023 Update to 0.7.2 (rhbz#2231640)