$ git clone -n https://src.fedoraproject.org/rpms/rust-gtk4-sys.git /var/lib/mock/f40-build-2169912-51008/root/chroot_tmpdir/scmroot/rust-gtk4-sys
Cloning into '/var/lib/mock/f40-build-2169912-51008/root/chroot_tmpdir/scmroot/rust-gtk4-sys'...
$ git fetch origin 0b25cd6905131d0c8388107a02aa16daf4eb2af8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gtk4-sys
 * [new ref]         0b25cd6905131d0c8388107a02aa16daf4eb2af8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b25cd6 Update to version 0.7.3; Fixes RHBZ#2240347