$ git clone -n https://src.fedoraproject.org/rpms/R-pdftools.git /var/lib/mock/f37-build-675045-75942/root/chroot_tmpdir/scmroot/R-pdftools
Cloning into '/var/lib/mock/f37-build-675045-75942/root/chroot_tmpdir/scmroot/R-pdftools'...
$ git reset --hard 4760f5fa056f975feea7e0f9bdd7633a14d2f0de
HEAD is now at 4760f5f Disable bootstrap