$ git clone -n https://src.fedoraproject.org/rpms/python-mirakuru.git /var/lib/mock/f45-build-31537-652/root/chroot_tmpdir/scmroot/python-mirakuru
Cloning into '/var/lib/mock/f45-build-31537-652/root/chroot_tmpdir/scmroot/python-mirakuru'...
$ git fetch origin a25facd5c916d3f08af1c2c46a6a3f7b6f7675ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mirakuru
 * [new ref]         a25facd5c916d3f08af1c2c46a6a3f7b6f7675ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a25facd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild