$ git clone -n https://src.fedoraproject.org/rpms/python-boto.git /var/lib/mock/f45-build-29795-641/root/chroot_tmpdir/scmroot/python-boto
Cloning into '/var/lib/mock/f45-build-29795-641/root/chroot_tmpdir/scmroot/python-boto'...
$ git fetch origin 3617357957081b7ae92bc52ea31aa57ca568e6d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-boto
 * [new ref]         3617357957081b7ae92bc52ea31aa57ca568e6d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3617357 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild