$ git clone -n https://src.fedoraproject.org/rpms/R-unix.git /var/lib/mock/f38-build-724949-99530/root/chroot_tmpdir/scmroot/R-unix
Cloning into '/var/lib/mock/f38-build-724949-99530/root/chroot_tmpdir/scmroot/R-unix'...
$ git reset --hard b1ce3b4ccca3eb6222c3dba69de2c0cb90dea411
HEAD is now at b1ce3b4 R-maint-sig mass rebuild