$ git clone -n https://src.fedoraproject.org/rpms/rust-bitfield.git /var/lib/mock/f45-build-40454-772/root/chroot_tmpdir/scmroot/rust-bitfield
Cloning into '/var/lib/mock/f45-build-40454-772/root/chroot_tmpdir/scmroot/rust-bitfield'...
$ git fetch origin 0660c45c16ba8f113fcabccfd5a947df4040f49d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bitfield
 * [new ref]         0660c45c16ba8f113fcabccfd5a947df4040f49d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0660c45 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild