$ git clone -n https://src.fedoraproject.org/rpms/digikam.git /var/lib/mock/f38-build-side-42-init-devel-702757-27088/root/chroot_tmpdir/scmroot/digikam
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-702757-27088/root/chroot_tmpdir/scmroot/digikam'...
$ git fetch origin 87856ca98ec578b23af3a34ca25c5af6014dea45:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/digikam
 * [new ref]         87856ca98ec578b23af3a34ca25c5af6014dea45 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 87856ca BR: libheif-devel