$ git clone -n https://src.fedoraproject.org/rpms/rust-gtk4-sys0.6.git /var/lib/mock/f40-build-2115796-50695/root/chroot_tmpdir/scmroot/rust-gtk4-sys0.6
Cloning into '/var/lib/mock/f40-build-2115796-50695/root/chroot_tmpdir/scmroot/rust-gtk4-sys0.6'...
$ git fetch origin 9559f611a4e99e4055ce02ff65e88aa11847095e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gtk4-sys0.6
 * [new ref]         9559f611a4e99e4055ce02ff65e88aa11847095e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9559f61 Initial import (gtk4-sys 0.6 compat package)