$ git clone -n https://src.fedoraproject.org/rpms/rust-gtk4-sys0.8 /var/lib/mock/f42-build-3429029-45391/root/chroot_tmpdir/scmroot/rust-gtk4-sys0.8
Cloning into '/var/lib/mock/f42-build-3429029-45391/root/chroot_tmpdir/scmroot/rust-gtk4-sys0.8'...
$ git fetch origin c983a2b0be9437ba148ff8e8d4c980c20d9eff43:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gtk4-sys0.8
 * [new ref]         c983a2b0be9437ba148ff8e8d4c980c20d9eff43 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c983a2b Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild