$ git clone -n https://src.fedoraproject.org/rpms/python-immutabledict.git /var/lib/mock/f45-build-31050-650/root/chroot_tmpdir/scmroot/python-immutabledict
Cloning into '/var/lib/mock/f45-build-31050-650/root/chroot_tmpdir/scmroot/python-immutabledict'...
$ git fetch origin 96a049ea0a7909d08dd86fa4966c2c165ffa95f9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-immutabledict
 * [new ref]         96a049ea0a7909d08dd86fa4966c2c165ffa95f9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96a049e Fix F45FTBFS (disabled performance related tests) rhbz#2504533