$ git clone -n https://src.fedoraproject.org/rpms/R-rmarkdown.git /var/lib/mock/f37-build-643606-72130/root/chroot_tmpdir/scmroot/R-rmarkdown
Cloning into '/var/lib/mock/f37-build-643606-72130/root/chroot_tmpdir/scmroot/R-rmarkdown'...
$ git reset --hard b992cbb4d0541b24f2d23ad9ec29e3f6879eb8a0
HEAD is now at b992cbb make font packages Requires instead of Recommends (rmarkdown assumes they are present)