$ git clone -n https://src.fedoraproject.org/rpms/ktimer.git /var/lib/mock/f42-build-side-1-3541386-46580/root/chroot_tmpdir/scmroot/ktimer
Cloning into '/var/lib/mock/f42-build-side-1-3541386-46580/root/chroot_tmpdir/scmroot/ktimer'...
$ git fetch origin 2b2413a956a8c5d91f979ec4e2a705b3384445b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ktimer
 * [new ref]         2b2413a956a8c5d91f979ec4e2a705b3384445b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b2413a 25.04.2