$ git clone -n https://src.fedoraproject.org/rpms/rust-gdk4-x11-sys.git /var/lib/mock/f39-build-1641201-40176/root/chroot_tmpdir/scmroot/rust-gdk4-x11-sys
Cloning into '/var/lib/mock/f39-build-1641201-40176/root/chroot_tmpdir/scmroot/rust-gdk4-x11-sys'...
$ git fetch origin 38f29418d52b7cf028dc646fb5725ec60193a324:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gdk4-x11-sys
 * [new ref]         38f29418d52b7cf028dc646fb5725ec60193a324 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38f2941 Update to 0.7.2 (rhbz#2231641)