$ git clone -n https://src.fedoraproject.org/rpms/R-sys.git /var/lib/mock/f37-build-641550-71971/root/chroot_tmpdir/scmroot/R-sys
Cloning into '/var/lib/mock/f37-build-641550-71971/root/chroot_tmpdir/scmroot/R-sys'...
$ git reset --hard 9a6e9309f504a5b09beed69674c0ff9be0dab0ef
HEAD is now at 9a6e930 rebuild for R 4.2.1