$ git clone -n https://src.fedoraproject.org/rpms/gnome-ponytail-daemon.git /var/lib/mock/f40-build-799083-142138/root/chroot_tmpdir/scmroot/gnome-ponytail-daemon
Cloning into '/var/lib/mock/f40-build-799083-142138/root/chroot_tmpdir/scmroot/gnome-ponytail-daemon'...
$ git fetch origin 151dcf76f573aab365ac1b760f6944e4d294dc4d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-ponytail-daemon
 * [new ref]         151dcf76f573aab365ac1b760f6944e4d294dc4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 151dcf7 Fix bogus date