$ git clone -n https://src.fedoraproject.org/rpms/xpdf.git /var/lib/mock/f31-build-61103-28823/root/chroot_tmpdir/scmroot/xpdf
Cloning into '/var/lib/mock/f31-build-61103-28823/root/chroot_tmpdir/scmroot/xpdf'...
$ git reset --hard 4ad19133907c6c99482d31de70371d2c51223575
HEAD is now at 4ad1913 update to 4.01