$ git clone -n https://src.fedoraproject.org/rpms/kalendar.git /var/lib/mock/f41-build-818896-14314/root/chroot_tmpdir/scmroot/kalendar
Cloning into '/var/lib/mock/f41-build-818896-14314/root/chroot_tmpdir/scmroot/kalendar'...
$ git fetch origin ca1cadd0cc560e65ee55d7d12efdf48263bf345f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kalendar
 * [new ref]         ca1cadd0cc560e65ee55d7d12efdf48263bf345f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca1cadd Replaced by merkuro