$ git clone -n https://src.fedoraproject.org/rpms/kf5-kcalendarutils.git /var/lib/mock/f38-build-side-42-init-devel-786881-27974/root/chroot_tmpdir/scmroot/kf5-kcalendarutils
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-786881-27974/root/chroot_tmpdir/scmroot/kf5-kcalendarutils'...
$ git fetch origin 2f463cfa22904912735191e4094024d7025feb8f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kcalendarutils
 * [new ref]         2f463cfa22904912735191e4094024d7025feb8f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f463cf Rebuild (grantlee-qt5)