$ git clone -n https://github.com/xcp-ng-rpms/createrepo_c.git /var/lib/mock/v8.3-u-pcoval2-10430-28991/root/chroot_tmpdir/scmroot/createrepo_c
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10430-28991/root/chroot_tmpdir/scmroot/createrepo_c'...
$ git fetch origin e038f4dc9210ec66fe2d81bccc07f47a022fb367:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/createrepo_c
 * [new ref]         e038f4dc9210ec66fe2d81bccc07f47a022fb367 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e038f4d bump release for test build