$ git clone -n https://src.fedoraproject.org/rpms/dolphin.git /var/lib/mock/f42-build-side-1-3562229-46722/root/chroot_tmpdir/scmroot/dolphin
Cloning into '/var/lib/mock/f42-build-side-1-3562229-46722/root/chroot_tmpdir/scmroot/dolphin'...
$ git fetch origin 02513c0c1e4484a355faa0558be66dbf9400bb51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dolphin
 * [new ref]         02513c0c1e4484a355faa0558be66dbf9400bb51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02513c0 25.04.2