$ git clone -n https://src.fedoraproject.org/rpms/python-stdlibs.git /var/lib/mock/f45-build-33198-667/root/chroot_tmpdir/scmroot/python-stdlibs
Cloning into '/var/lib/mock/f45-build-33198-667/root/chroot_tmpdir/scmroot/python-stdlibs'...
$ git fetch origin afa2be9869a21ef99bc66ef6eb92ea4b98060d26:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-stdlibs
 * [new ref]         afa2be9869a21ef99bc66ef6eb92ea4b98060d26 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at afa2be9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild