$ git clone -n https://src.fedoraproject.org/rpms/mate-desktop.git /var/lib/mock/f31-build-108833-33873/root/chroot_tmpdir/scmroot/mate-desktop
Cloning into '/var/lib/mock/f31-build-108833-33873/root/chroot_tmpdir/scmroot/mate-desktop'...
$ git reset --hard 15f56dcdadf88f07b5b9ed85e16d756424742ad9
HEAD is now at 15f56dc use f31-backgrounds