$ git clone -n https://src.fedoraproject.org/rpms/rust-lv2-units.git /var/lib/mock/f45-build-43079-799/root/chroot_tmpdir/scmroot/rust-lv2-units
Cloning into '/var/lib/mock/f45-build-43079-799/root/chroot_tmpdir/scmroot/rust-lv2-units'...
$ git fetch origin 594e63e02c86cb7aa7e3f677686070e2f99e2e21:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lv2-units
 * [new ref]         594e63e02c86cb7aa7e3f677686070e2f99e2e21 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 594e63e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild