$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.1-testing-2795-2241/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.1-testing-2795-2241/root/chroot_tmpdir/scmroot/xen'...
$ git reset --hard 25dce997226c80b2da1bce43330faf23baeab38d
Downloading SOURCES/xen.tar.gz (28 MB)
HEAD is now at 25dce99 Merge branch 'XS-8.1' into 8.1