$ git clone -n https://src.fedoraproject.org/rpms/python-installer.git /var/lib/mock/f45-build-31112-650/root/chroot_tmpdir/scmroot/python-installer
Cloning into '/var/lib/mock/f45-build-31112-650/root/chroot_tmpdir/scmroot/python-installer'...
$ git fetch origin d399abdfb2f33bc5eacd599a7a6521bba91a9ee2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-installer
 * [new ref]         d399abdfb2f33bc5eacd599a7a6521bba91a9ee2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d399abd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild