$ git clone -n https://src.fedoraproject.org/rpms/stubby.git /var/lib/mock/f45-build-36514-706/root/chroot_tmpdir/scmroot/stubby
Cloning into '/var/lib/mock/f45-build-36514-706/root/chroot_tmpdir/scmroot/stubby'...
$ git fetch origin c33a84ff9950787cf95212f6aad3676827904a6d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stubby
 * [new ref]         c33a84ff9950787cf95212f6aad3676827904a6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c33a84f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild