$ git clone -n https://github.com/xcp-ng-rpms/curl.git /var/lib/mock/v8.3-u-pcoval2-10412-28973/root/chroot_tmpdir/scmroot/curl
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10412-28973/root/chroot_tmpdir/scmroot/curl'...
$ git fetch origin 951fb3cc8a11ba004c5db9203d8815870ad6f5e7:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/curl
 * [new ref]         951fb3cc8a11ba004c5db9203d8815870ad6f5e7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 951fb3c bump release for test build