$ git clone -n https://src.fedoraproject.org/rpms/rust-is_debug.git /var/lib/mock/f45-build-42676-795/root/chroot_tmpdir/scmroot/rust-is_debug
Cloning into '/var/lib/mock/f45-build-42676-795/root/chroot_tmpdir/scmroot/rust-is_debug'...
$ git fetch origin eddd50ef67b94347a8bdcc1e1ccc458907ec68da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-is_debug
 * [new ref]         eddd50ef67b94347a8bdcc1e1ccc458907ec68da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eddd50e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild