$ git clone -n https://src.fedoraproject.org/rpms/rust-gdk4.git /var/lib/mock/f38-build-side-43-rust-devel-1405555-31258/root/chroot_tmpdir/scmroot/rust-gdk4
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1405555-31258/root/chroot_tmpdir/scmroot/rust-gdk4'...
$ git fetch origin c18c763122850a3a1667221f48730a9076e32df7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gdk4
 * [new ref]         c18c763122850a3a1667221f48730a9076e32df7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c18c763 Update to version 0.7.3; Fixes RHBZ#2240342