$ git clone -n https://src.fedoraproject.org/rpms/rust-retry.git /var/lib/mock/f45-build-44393-813/root/chroot_tmpdir/scmroot/rust-retry
Cloning into '/var/lib/mock/f45-build-44393-813/root/chroot_tmpdir/scmroot/rust-retry'...
$ git fetch origin 241d0b87c3ee2a6d27f64a281164b3eaef959f06:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-retry
 * [new ref]         241d0b87c3ee2a6d27f64a281164b3eaef959f06 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 241d0b8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild