$ git clone -n https://src.fedoraproject.org/rpms/rust-lv2-worker.git /var/lib/mock/f45-build-43086-800/root/chroot_tmpdir/scmroot/rust-lv2-worker
Cloning into '/var/lib/mock/f45-build-43086-800/root/chroot_tmpdir/scmroot/rust-lv2-worker'...
$ git fetch origin 7d96341c14cf1ac61cab7ce5238cc4c42addacd9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lv2-worker
 * [new ref]         7d96341c14cf1ac61cab7ce5238cc4c42addacd9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d96341 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild