$ git clone -n https://src.fedoraproject.org/rpms/rust-bitstring.git /var/lib/mock/f45-build-40459-772/root/chroot_tmpdir/scmroot/rust-bitstring
Cloning into '/var/lib/mock/f45-build-40459-772/root/chroot_tmpdir/scmroot/rust-bitstring'...
$ git fetch origin 240f1d8df9547da86bb00f63e4fe790929c05010:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bitstring
 * [new ref]         240f1d8df9547da86bb00f63e4fe790929c05010 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 240f1d8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild