$ git clone -n https://github.com/xcp-ng-rpms/gcc-xs.git /var/lib/mock/v7.99-base-526-246/root/chroot_tmpdir/scmroot/gcc-xs
Cloning into '/var/lib/mock/v7.99-base-526-246/root/chroot_tmpdir/scmroot/gcc-xs'...
$ git reset --hard d5b2e20bb3d773c660c13e5ddc225010cfae86f1
Downloading SOURCES/gcc-xs-7.3.0.tar.gz (98 MB)
HEAD is now at d5b2e20 Add %dist