$ git clone -n https://src.fedoraproject.org/rpms/rust-threecpio.git /var/lib/mock/f45-build-45462-823/root/chroot_tmpdir/scmroot/rust-threecpio
Cloning into '/var/lib/mock/f45-build-45462-823/root/chroot_tmpdir/scmroot/rust-threecpio'...
$ git fetch origin 71f24fbfb0647620a56eea86a65ec19ce5e836a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-threecpio
 * [new ref]         71f24fbfb0647620a56eea86a65ec19ce5e836a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71f24fb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild