$ git clone -n https://github.com/xcp-ng-rpms/curl.git /var/lib/mock/v8.3-u-pcoval2-10069-28699/root/chroot_tmpdir/scmroot/curl
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10069-28699/root/chroot_tmpdir/scmroot/curl'...
$ git fetch origin abf2e8aa161548d80351f5af1866ec42e12383f8:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/curl
 * [new ref]         abf2e8aa161548d80351f5af1866ec42e12383f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at abf2e8a bump release for test build