$ git clone -n https://github.com/xcp-ng-rpms/opam.git /var/lib/mock/v8.3-base-3867-3810/root/chroot_tmpdir/scmroot/opam
Cloning into '/var/lib/mock/v8.3-base-3867-3810/root/chroot_tmpdir/scmroot/opam'...
$ git reset --hard c471c503174701d86f7e47b904ada8b77d5731c7
Downloading SOURCES/opam-full-2.0.10.tar.gz (8.2 MB)
HEAD is now at c471c50 Merge branch 'XS-8.3'