$ git clone -n https://src.fedoraproject.org/rpms/rust-parking_lot_core.git /var/lib/mock/f45-build-43710-805/root/chroot_tmpdir/scmroot/rust-parking_lot_core
Cloning into '/var/lib/mock/f45-build-43710-805/root/chroot_tmpdir/scmroot/rust-parking_lot_core'...
$ git fetch origin ebe032a3a67ffc114ee4c1e2a1b4832b1a40a3ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-parking_lot_core
 * [new ref]         ebe032a3a67ffc114ee4c1e2a1b4832b1a40a3ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ebe032a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild