$ git clone -n https://src.fedoraproject.org/rpms/rust-rand_pcg0.9.git /var/lib/mock/f45-build-44260-812/root/chroot_tmpdir/scmroot/rust-rand_pcg0.9
Cloning into '/var/lib/mock/f45-build-44260-812/root/chroot_tmpdir/scmroot/rust-rand_pcg0.9'...
$ git fetch origin da293fe12bc5d7803ff70318e04c4e4fe7d32837:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rand_pcg0.9
 * [new ref]         da293fe12bc5d7803ff70318e04c4e4fe7d32837 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da293fe Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild