$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-9250-28034/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-9250-28034/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 4de4c4a9c3dc5b9a6abbba894e465b5964806f0b:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         4de4c4a9c3dc5b9a6abbba894e465b5964806f0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4de4c4a bump release for test build