$ git clone -n https://src.fedoraproject.org/rpms/rust-bitvec.git /var/lib/mock/f45-build-40469-772/root/chroot_tmpdir/scmroot/rust-bitvec
Cloning into '/var/lib/mock/f45-build-40469-772/root/chroot_tmpdir/scmroot/rust-bitvec'...
$ git fetch origin 619caabb0f1e1c6699987e3e99ba0a746600feeb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bitvec
 * [new ref]         619caabb0f1e1c6699987e3e99ba0a746600feeb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 619caab Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild