$ git clone -n https://src.fedoraproject.org/rpms/R-rtracklayer.git /var/lib/mock/f31-build-99585-33178/root/chroot_tmpdir/scmroot/R-rtracklayer
Cloning into '/var/lib/mock/f31-build-99585-33178/root/chroot_tmpdir/scmroot/R-rtracklayer'...
$ git reset --hard dc2a21474a6741157524b7bddc8f3033be3815ec
HEAD is now at dc2a214 Remove explicit dependencies provided by automatic dependency generator.