$ git clone -n https://src.fedoraproject.org/rpms/gnome-shell.git /var/lib/mock/f40-build-768897-125430/root/chroot_tmpdir/scmroot/gnome-shell
Cloning into '/var/lib/mock/f40-build-768897-125430/root/chroot_tmpdir/scmroot/gnome-shell'...
$ git reset --hard 8c09aad1ec87ea5560858751d641372ebe2973ab
HEAD is now at 8c09aad Rename firefox.desktop to org.mozilla.firefox.desktop at RENAMED_DESKTOP_IDS