$ git clone -n https://src.fedoraproject.org/rpms/rust-is_ci.git /var/lib/mock/f45-build-42675-795/root/chroot_tmpdir/scmroot/rust-is_ci
Cloning into '/var/lib/mock/f45-build-42675-795/root/chroot_tmpdir/scmroot/rust-is_ci'...
$ git fetch origin f5cc9cc2a121414ebaf23bf7f0586f5caa5b845d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-is_ci
 * [new ref]         f5cc9cc2a121414ebaf23bf7f0586f5caa5b845d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5cc9cc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild