$ git clone -n https://src.fedoraproject.org/rpms/phonon-backend-gstreamer.git /var/lib/mock/f31-build-47811-26972/root/chroot_tmpdir/scmroot/phonon-backend-gstreamer
Cloning into '/var/lib/mock/f31-build-47811-26972/root/chroot_tmpdir/scmroot/phonon-backend-gstreamer'...
$ git reset --hard 638748d3fd39b1567efc5b4d4fab17afbf14b054
HEAD is now at 638748d rebuild