$ git clone -n https://src.fedoraproject.org/rpms/luminance-hdr.git /var/lib/mock/f31-build-99563-33176/root/chroot_tmpdir/scmroot/luminance-hdr
Cloning into '/var/lib/mock/f31-build-99563-33176/root/chroot_tmpdir/scmroot/luminance-hdr'...
$ git reset --hard 902a185a8a671b3de2bd0549df5c045522b4cae2
Checking out files:  94% (16/17)   
Checking out files: 100% (17/17)   
Checking out files: 100% (17/17), done.
HEAD is now at 902a185 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild