$ git clone -n https://src.fedoraproject.org/rpms/python-irc.git /var/lib/mock/f45-build-31148-650/root/chroot_tmpdir/scmroot/python-irc
Cloning into '/var/lib/mock/f45-build-31148-650/root/chroot_tmpdir/scmroot/python-irc'...
$ git fetch origin c33fe1de83eb8ceff9346271bf591fabad62dafd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-irc
 * [new ref]         c33fe1de83eb8ceff9346271bf591fabad62dafd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c33fe1d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild