$ git clone -n https://src.fedoraproject.org/rpms/gnome-shell-frippery.git /var/lib/mock/f39-build-1465291-33575/root/chroot_tmpdir/scmroot/gnome-shell-frippery
Cloning into '/var/lib/mock/f39-build-1465291-33575/root/chroot_tmpdir/scmroot/gnome-shell-frippery'...
$ git fetch origin 06bb4d6b0d74209cf13a7e9e8ff50f9a563eb88b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-shell-frippery
 * [new ref]         06bb4d6b0d74209cf13a7e9e8ff50f9a563eb88b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06bb4d6 Update to 45.0; Fixes: RHBZ#2243189