$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.2-u-dml1-6213-12292/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.2-u-dml1-6213-12292/root/chroot_tmpdir/scmroot/xen'...
$ git reset --hard 51b1809a16973cd7ff1b27c2c9f548c2eff678c9
Downloading SOURCES/xen-4.13.5.tar.gz (6.2 MB)
HEAD is now at 51b1809 Security update: XSA-454 v1 backport