$ git clone -n https://src.fedoraproject.org/rpms/python-imagesize.git /var/lib/mock/f45-build-39486-735/root/chroot_tmpdir/scmroot/python-imagesize
Cloning into '/var/lib/mock/f45-build-39486-735/root/chroot_tmpdir/scmroot/python-imagesize'...
$ git fetch origin 8d9c8b546cd47e423d12e241e3e4fcb569b1052a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-imagesize
 * [new ref]         8d9c8b546cd47e423d12e241e3e4fcb569b1052a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d9c8b5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild