$ git clone -n https://src.fedoraproject.org/rpms/gdcm.git /var/lib/mock/f33-build-334917-58368/root/chroot_tmpdir/scmroot/gdcm
Cloning into '/var/lib/mock/f33-build-334917-58368/root/chroot_tmpdir/scmroot/gdcm'...
$ git reset --hard dddc191277e5d544ff3fb096583cf0f9bcbb3dc2
HEAD is now at dddc191 Re-add second source