$ git clone -n https://src.fedoraproject.org/rpms/viking.git /var/lib/mock/f38-build-side-42-init-devel-1288264-30674/root/chroot_tmpdir/scmroot/viking
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1288264-30674/root/chroot_tmpdir/scmroot/viking'...
$ git fetch origin f5b2b0ea2938a5ca68e992479ff2bafcfacdaadf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/viking
 * [new ref]         f5b2b0ea2938a5ca68e992479ff2bafcfacdaadf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5b2b0e Update to viking 1.10.