$ git clone -n https://src.fedoraproject.org/rpms/kobo.git /var/lib/mock/f45-build-15313-472/root/chroot_tmpdir/scmroot/kobo
Cloning into '/var/lib/mock/f45-build-15313-472/root/chroot_tmpdir/scmroot/kobo'...
$ git fetch origin 3838da3a619e1477c8e0e4f61a8e5dac868407b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kobo
 * [new ref]         3838da3a619e1477c8e0e4f61a8e5dac868407b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3838da3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild