$ git clone -n https://src.fedoraproject.org/rpms/libzim.git /var/lib/mock/f45-build-17317-498/root/chroot_tmpdir/scmroot/libzim
Cloning into '/var/lib/mock/f45-build-17317-498/root/chroot_tmpdir/scmroot/libzim'...
$ git fetch origin 6a62d14a4ac40f30f1d4e8be14add79c9a4ab60f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libzim
 * [new ref]         6a62d14a4ac40f30f1d4e8be14add79c9a4ab60f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a62d14 Updated to version 9.8.2.