$ git clone -n https://github.com/xcp-ng-rpms/curl.git /var/lib/mock/v8.3-u-pcoval2-10582-29137/root/chroot_tmpdir/scmroot/curl
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10582-29137/root/chroot_tmpdir/scmroot/curl'...
$ git fetch origin 74b6713951f470d0fcab1684e2e2607145d04a5d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/curl
 * [new ref]         74b6713951f470d0fcab1684e2e2607145d04a5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74b6713 bump release for test build