$ git clone -n https://src.fedoraproject.org/rpms/firefox.git /var/lib/mock/f33-build-555609-65405/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/f33-build-555609-65405/root/chroot_tmpdir/scmroot/firefox'...
$ git reset --hard 624b802b9ceb9c6bbc5e923c0a2f718ce9558f20
HEAD is now at 624b802 xpcshell-test fixes