$ git clone -n https://src.fedoraproject.org/rpms/R.git /var/lib/mock/f31-build-62099-29035/root/chroot_tmpdir/scmroot/R
Cloning into '/var/lib/mock/f31-build-62099-29035/root/chroot_tmpdir/scmroot/R'...
$ git reset --hard 7ec3f35afe2cd857c71f112fae9499f5f5b6615a
Checking out files:  72% (18/25)   
Checking out files:  76% (19/25)   
Checking out files:  80% (20/25)   
Checking out files:  84% (21/25)   
Checking out files:  88% (22/25)   
Checking out files:  92% (23/25)   
Checking out files:  96% (24/25)   
Checking out files: 100% (25/25)   
Checking out files: 100% (25/25), done.
HEAD is now at 7ec3f35 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild