$ git clone -n https://src.fedoraproject.org/rpms/rust-gtk4.git /var/lib/mock/f40-build-2072791-49334/root/chroot_tmpdir/scmroot/rust-gtk4
Cloning into '/var/lib/mock/f40-build-2072791-49334/root/chroot_tmpdir/scmroot/rust-gtk4'...
$ git fetch origin 9a6cbbb0d7a6d598d84b1770a70ac56529da2c5a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gtk4
 * [new ref]         9a6cbbb0d7a6d598d84b1770a70ac56529da2c5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a6cbbb Update to version 0.7.3; Fixes RHBZ#2240345