$ git clone -n https://src.fedoraproject.org/rpms/gensio.git /var/lib/mock/f42-build-side-1-3588360-46945/root/chroot_tmpdir/scmroot/gensio
Cloning into '/var/lib/mock/f42-build-side-1-3588360-46945/root/chroot_tmpdir/scmroot/gensio'...
$ git fetch origin de6578374ac03e8d11ae5993f33956a57213647d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gensio
 * [new ref]         de6578374ac03e8d11ae5993f33956a57213647d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de65783 update to 2.8.15