$ git clone -n https://src.fedoraproject.org/rpms/fastlz.git /var/lib/mock/f45-build-8687-394/root/chroot_tmpdir/scmroot/fastlz
Cloning into '/var/lib/mock/f45-build-8687-394/root/chroot_tmpdir/scmroot/fastlz'...
$ git fetch origin 3796b0f3a2012bfbbd11374a405613fefb49b89a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fastlz
 * [new ref]         3796b0f3a2012bfbbd11374a405613fefb49b89a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3796b0f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild