$ git clone -n https://src.fedoraproject.org/rpms/kcalutils.git /var/lib/mock/f42-build-871528-177655/root/chroot_tmpdir/scmroot/kcalutils
Cloning into '/var/lib/mock/f42-build-871528-177655/root/chroot_tmpdir/scmroot/kcalutils'...
$ git fetch origin 464428907957a6496b348033895e79dd5ead8ff3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kcalutils
 * [new ref]         464428907957a6496b348033895e79dd5ead8ff3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4644289 24.12.2