$ git clone -n https://github.com/xcp-ng-rpms/xs-opam-repo.git /var/lib/mock/v8.3-u-asultanov2-11506-29816/root/chroot_tmpdir/scmroot/xs-opam-repo
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11506-29816/root/chroot_tmpdir/scmroot/xs-opam-repo'...
$ git fetch origin f2d6bcb80404152adf941f723352914113022708:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xs-opam-repo
 * [new ref]         f2d6bcb80404152adf941f723352914113022708 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2d6bcb bump release for test build