$ git clone -n https://src.fedoraproject.org/rpms/rust-gtk4-sys.git /var/lib/mock/f40-build-2713284-72128/root/chroot_tmpdir/scmroot/rust-gtk4-sys
Cloning into '/var/lib/mock/f40-build-2713284-72128/root/chroot_tmpdir/scmroot/rust-gtk4-sys'...
$ git fetch origin df4f55067cd906232421d94756193261bafaf642:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gtk4-sys
 * [new ref]         df4f55067cd906232421d94756193261bafaf642 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df4f550 Update to version 0.8.1; Fixes RHBZ#2262632