$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-9793-28510/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-9793-28510/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 1dae0620cf048fa126fb2e1ca37a87286874172e:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         1dae0620cf048fa126fb2e1ca37a87286874172e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1dae062 bump release for test build